Add views directory and UI improvements

- Add all view templates (servers, auth, dashboard, admin, layouts, errors, terminal)
- Fix SSH double decryption bug in SSHService
- Fix router parameter type casting for strict_types
- Add missing error views (401, 403, 404)
- Add nginx manager with file editing
- Add SSL certificates management
- Add database manager with phpMyAdmin-like interface
- Add sidebar server accordion

views/servers/logs.php

@@ -0,0 +1,76 @@
+<?php
+$server = $server ?? [];
+$logOutput = $logOutput ?? '';
+$logType = $logType ?? 'syslog';
+$lines = $lines ?? 100;
+$logFiles = $logFiles ?? [];
+?>
+
+<div class="page-header">
+    <div class="page-header-left">
+        <div class="back-link">
+            <a href="/servers/<?= $server['id'] ?>"><i class="fas fa-arrow-left"></i> Back to Server</a>
+        </div>
+        <h1 class="page-title">System Logs</h1>
+        <p class="page-subtitle"><?= htmlspecialchars($server['name']) ?></p>
+    </div>
+</div>
+
+<div class="card">
+    <div class="card-header">
+        <div class="card-filters">
+            <select id="logType" class="form-select" onchange="updateLog()">
+                <?php foreach ($logFiles as $file): ?>
+                    <option value="<?= $file ?>" <?= $logType === $file ? 'selected' : '' ?>>
+                        <?= ucfirst($file) ?>
+                    </option>
+                <?php endforeach; ?>
+            </select>
+            <select id="logLines" class="form-select" onchange="updateLog()">
+                <option value="50" <?= $lines == 50 ? 'selected' : '' ?>>50 lines</option>
+                <option value="100" <?= $lines == 100 ? 'selected' : '' ?>>100 lines</option>
+                <option value="200" <?= $lines == 200 ? 'selected' : '' ?>>200 lines</option>
+                <option value="500" <?= $lines == 500 ? 'selected' : '' ?>>500 lines</option>
+            </select>
+            <button class="btn btn-secondary btn-sm" onclick="updateLog()">
+                <i class="fas fa-sync-alt"></i> Refresh
+            </button>
+        </div>
+    </div>
+    <div class="card-body">
+        <?php if (empty(trim($logOutput))): ?>
+            <div class="empty-state">
+                <i class="fas fa-file-alt empty-icon"></i>
+                <p>No log data available.</p>
+            </div>
+        <?php else: ?>
+            <div class="log-viewer">
+                <?php
+                $logLines = explode("\n", trim($logOutput));
+                foreach ($logLines as $line):
+                    $lineClass = 'log-line';
+                    $lower = mb_strtolower($line);
+                    if (str_contains($lower, 'error') || str_contains($lower, 'critical') || str_contains($lower, 'emergency')) {
+                        $lineClass .= ' log-line-error';
+                    } elseif (str_contains($lower, 'warning') || str_contains($lower, 'warn')) {
+                        $lineClass .= ' log-line-warning';
+                    } elseif (str_contains($lower, 'notice') || str_contains($lower, 'info')) {
+                        $lineClass .= ' log-line-info';
+                    }
+                ?>
+                    <div class="<?= $lineClass ?>">
+                        <code><?= htmlspecialchars($line) ?></code>
+                    </div>
+                <?php endforeach; ?>
+            </div>
+        <?php endif; ?>
+    </div>
+</div>
+
+<script>
+function updateLog() {
+    const type = document.getElementById('logType').value;
+    const lines = document.getElementById('logLines').value;
+    window.location.href = '/servers/<?= $server['id'] ?>/logs?type=' + type + '&lines=' + lines;
+}
+</script>